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Re: Squid 3.5.1 intercept / Forwarding loop detected for

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Hi,

thx for support.

I found second running squid on same box. I shut-down the second squid.
But the problems are not gone......

Sorry I don't have access to the router pc :-( I can not get the rule ....

I have set up web browsers to use direct squid with 3129.
But the result its same.
I found another logs too:

2015/02/14 23:52:25.957 kid1| SECURITY ALERT: Host header forgery detected on local=192.168.15.2:3129 remote=10.0.0.7:54648 FD 77 flags=33 (intercepted port does not match 443)
2015/02/14 23:52:25.957 kid1| SECURITY ALERT: By user agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko/20100101 Firefox/12.0
2015/02/14 23:52:25.957 kid1| SECURITY ALERT: on URL: www.youtube.com:443

OS ist Slackware on squid box.
All web browser on client PCs is set to use proxy server

Topology is:
Clients PC connected to switch -> switch to Router pc -> squid its on DMZ Von Router pc

thx for support


On Thu, Feb 12, 2015 at 3:34 PM, Luis Miguel Silva <luismiguelferreirasilva@xxxxxxxxx> wrote:
I bumped into this same "forwarding loop" problem yesterday!
In my case, it was because I had two transparent proxies in the same network and was basically redirecting traffic twice:
[internet] <-> [appliance 1] <-> [appliance 2] <-> [client computer]

I mistakenly added iptables redirect rules in both appliance 1 and appliance 2 and that caused Squid to spit out that "forwarding loop detected" error.


On Thu, Feb 12, 2015 at 4:40 AM, Antony Stone <Antony.Stone@xxxxxxxxxxxxxxxxxxxx> wrote:
On Thursday 12 Feb 2015 at 11:26, naser sonbaty wrote:

> Hi,
>
> Internet is connected to Router PC
>
> Only trafic to port 80 is send to squid.

Yes, I know that, but traffic *from* where?

Please answer the question below.  Even better, show us the redirect rule
you're using on the router to do it.

> On Thu, Feb 12, 2015 at 11:58 AM, Antony Stone wrote:
> >
> > Have you configured the router to redirect port 80 traffic from the
> > Client PC to Squid 3129, or have you configured it to redirect *all* port
> > 80 traffic (including from Squid) to Squid 3129?
> >
> > Looks like the Router is making Squid talk to itself.


Regards,


Antony.

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